The present invention is one kind of no-fluorine composite slag melting agent for converter steelmaking and its production process. The no-fluorine composite slag melting agent as one kind of steelmaking supplementary material consists of FeO 40-50 wt%, CaO 10-20 wt%, MnO 12-45 wt%, H2O 0.5-1 wt%, MgO 1-8 wt%, Al2O3 and SiO2 1-10 wt%, and impurity for the rest. Its production process includes the steps of compounding, grinding, adding adhesive, stirring, pelletizing, curing and roasting. It is used in no-fluorine steelmaking with less invasion to converter lining, long converter service life, less environmental pollution, low production cost and other advantages.