A threshold distributed elliptic curve key generation and signature method, comprising the following steps: S1, in the absence of a trusted center to participate, all n nodes generate their own key pair, ptki, puki, wherein ptki is a private key, and puki is a public key. S2, each node processes its own public-private key pair according to a secret sharing protocol, and completes the conversion of a (n, n) threshold to a (t, n) threshold. S3, after determining t signature nodes, each node generates a (t, t) threshold private key according to a threshold logic, and completes a mapping of ptki to ptki', wherein ptki' is the threshold private key, by means of a process comprising: S31, all n nodes, according to the rules of the elliptic curve, each generate their own key pair, ptki, puki, wherein ptki is the private key, puki is the public key, and i is the node number; S32, all n nodes broadcast their own public keys puki to other nodes, and after receiving the pukx broadcasted by other n-1 nodes, combine n pukx into a complete public key PUK according to the elliptic curve operation. S33, all n nodes do the (t,n) threshold processing according to a selected secret sharing protocol, map ptki to n segments ptkij, and send ptkij to the corresponding node numbered j; and S34, when a signature is performed, t available nodes recover ptki' using the received n ptkij according to the recovery method of the selected secret sharing protocol; and S4, according to signature logic, each node uses ptki' to complete a communication and calculation in the signature protocol, and stores the relevant calculation results, and finally completes the overall signature. S1, in the absence of a trusted center to participate, all n nodes generate their own key pair, ptki, puki, wherein ptki is a private key, and puki is a public key. S2, each node processes its own public-private key pair according to a secret sharing protocol, and completes the conversion of a (n, n) threshold to a (t, n) threshold. S3, after determining t signature nodes, each node generates a (t, t) threshold private key according to a threshold logic, and completes a mapping of ptki to ptki', wherein ptki' is the threshold private key, by means of a process comprising: S31, all n nodes, according to the rules of the elliptic curve, each generate their own key pair, ptki, puki, wherein ptki is the private key, puki is the public key, and i is the node number; S32, all n nodes broadcast their own public keys puki to other nodes, and after receiving the pukx broadcasted by other n-1 nodes, combine n pukx into a complete public key PUK according to the elliptic curve operation. S33, all n nodes do the (t,n) threshold processing according to a selected secret sharing protocol, map ptki to n segments ptkij, and send ptkij to the corresponding node numbered j; and S34, when a signature is performed, t available nodes recover ptki' using the received n ptkij according to the recovery method of the selected secret sharing protocol; and S31, all n nodes, according to the rules of the elliptic curve, each generate their own key pair, ptki, puki, wherein ptki is the private key, puki is the public key, and i is the node number; S32, all n nodes broadcast their own public keys puki to other nodes, and after receiving the pukx broadcasted by other n-1 nodes, combine n pukx into a complete public key PUK according to the elliptic curve operation. S33, all n nodes do the (t,n) threshold processing according to a selected secret sharing protocol, map ptki to n segments ptkij, and send ptkij to the corresponding node numbered j; and S34, when a signature is performed, t available nodes recover ptki' using the received n ptkij according to the recovery method of the selected secret sharing protocol; S4, according to signature logic, each node uses ptki' to complete a communication and calculation in the signature protocol, and stores the relevant calculation results, and finally completes the overall signature.