Network attacks, data tampering, information leakage and other security threats have had a serious impact on the distribution network scheduling system, leading to serious consequences such as power supply interruption and equipment damage. To ensure the security and rationality of digital distribution network scheduling, a data security control technology for distribution network scheduling based on multi-source information fusion is studied. Build a digital distribution network scheduling intelligent security control platform, collect digital distribution network scheduling data, thus more accurately judging the operation status of the distribution network. By using probability data association algorithm, the correlation between multi-source digital distribution network scheduling data is calculated, and the joint Kalman filter (KF) algorithm is used to fuse multi-source digital distribution network scheduling data., the intelligent security control of digital distribution network scheduling is achieved by using the elliptic curve public key cryptography algorithm (SM2 national encryption algorithm), encrypt and fuse multi-source digital distribution network scheduling data, which ensures the security and reliability of digital distribution network scheduling data. The experimental results show that the technology proposed in this paper can effectively ensure the security of digital distribution network scheduling data. When there are attacks on the transmitted distribution network scheduling data, the proposed technology can effectively filter the attack content and achieve intelligent security control of distribution network scheduling.