diff --git "a/USTB\346\231\272\350\203\275\345\256\211\345\205\250\350\277\220\347\273\264/BFV.py" "b/USTB\346\231\272\350\203\275\345\256\211\345\205\250\350\277\220\347\273\264/BFV.py"
new file mode 100644
index 0000000000000000000000000000000000000000..2d8707ba3def63100c4170cbbe399286c1d8ff75
--- /dev/null
+++ "b/USTB\346\231\272\350\203\275\345\256\211\345\205\250\350\277\220\347\273\264/BFV.py"
@@ -0,0 +1,115 @@
+import time
+
+import tenseal as ts
+import numpy as np
+
+def gencontext1():
+    context = ts.context(ts.SCHEME_TYPE.BFV, 2048, 786433, coeff_mod_bit_sizes=[20, 20])
+    context.global_scale = pow(2, 21)
+    context.generate_galois_keys()
+    return context
+
+
+def gencontext2():
+    context = ts.context(ts.SCHEME_TYPE.BFV, 4096, 786433, coeff_mod_bit_sizes=[18, 18, 18])
+    context.global_scale = pow(2, 21)
+    context.generate_galois_keys()
+    return context
+
+
+def gencontext3():
+    context = ts.context(ts.SCHEME_TYPE.BFV, 4096, 786433, coeff_mod_bit_sizes=[40, 20, 40])
+    context.global_scale = pow(2, 21)
+    context.generate_galois_keys()
+    return context
+
+
+def gencontext4():
+    context = ts.context(ts.SCHEME_TYPE.BFV, 8192, 786433, coeff_mod_bit_sizes=[40, 20, 40])
+    context.global_scale = pow(2, 21)
+    context.generate_galois_keys()
+    return context
+
+
+def gencontext5():
+    context = ts.context(ts.SCHEME_TYPE.BFV, 8192, 786433, coeff_mod_bit_sizes=[40, 21, 21, 21, 40])
+    context.global_scale = pow(2, 21)
+    context.generate_galois_keys()
+    return context
+
+
+def gencontext6():
+    context = ts.context(ts.SCHEME_TYPE.BFV, 8192, 786433, coeff_mod_bit_sizes=[40, 21, 21, 21, 21, 40])
+    context.global_scale = pow(2, 21)
+    context.generate_galois_keys()
+    return context
+
+
+def encrypt(context, np_tensor):
+    return ts.bfv_tensor(context, np_tensor)
+
+def decrypt(enc_tensor):
+    return np.array(enc_tensor.decrypt().tolist())
+
+def bootstrap(context, tensor):
+    # To refresh a tensor with exhausted depth.
+    # Here, bootstrap = enc(dec())
+    tmp = decrypt(tensor)
+    return encrypt(context, tmp)
+
+if __name__ == "__main__":
+
+    print("=============BFV TEST=============")
+
+    a = np.array([311618, 8, 46])
+    print("明文：", a)
+
+    start_time1 = time.time()
+    for i in range(10):
+        context = gencontext1()
+        enc_1 = encrypt(context, a)
+        decrypt(enc_1)
+    end_time1 = time.time()
+    print("Polynomial modulus:2048	Coefficient modulus sizes:[20,20]	Time:", (end_time1 - start_time1)/10, "s")
+    print("解密后", decrypt(enc_1))
+
+    start_time2 = time.time()
+    for i in range(10):
+        context = gencontext2()
+        enc_2 = encrypt(context, a)
+        decrypt(enc_2)
+    end_time2 = time.time()
+    print("Polynomial modulus:4096	Coefficient modulus sizes:[30,20,30]	Time:", (end_time2 - start_time2)/10, "s")
+    print("解密后", decrypt(enc_2))
+
+    start_time3 = time.time()
+    for i in range(10):
+        context = gencontext4()
+        enc_3 = encrypt(context, a)
+        decrypt(enc_3)
+    end_time3 = time.time()
+    print("Polynomial modulus:4096	Coefficient modulus sizes:[40,20,40]	Time:", (end_time3 - start_time3)/10, "s")
+
+    start_time4 = time.time()
+    for i in range(10):
+        context = gencontext4()
+        enc_4 = encrypt(context, a)
+        decrypt(enc_4)
+    end_time4 = time.time()
+    print("Polynomial modulus:8192	Coefficient modulus sizes:[40,20,40]	Time:", (end_time4 - start_time4)/10, "s")
+
+    start_time5 = time.time()
+    for i in range(10):
+        context = gencontext4()
+        enc_5 = encrypt(context, a)
+        decrypt(enc_5)
+    end_time5 = time.time()
+    print("Polynomial modulus:8192	Coefficient modulus sizes:[40, 21, 21, 21, 40]	Time:", (end_time5 - start_time5)/10, "s")
+
+    start_time6 = time.time()
+    for i in range(10):
+        context = gencontext4()
+        enc_6 = encrypt(context, a)
+        decrypt(enc_6)
+    end_time6 = time.time()
+    print("Polynomial modulus:8192	Coefficient modulus sizes:[40, 21, 21, 21, 21, 40]	Time:", (end_time6 - start_time6)/10, "s")