To improve the raw material resources of ultra high performance concrete （UHPC） for construction and application, a new kind of UHPC reactive powder concrete with superfine cement (SC RPC） was prepared. And the influences of water to binder ratio, sand to binder ratio, dosage of additives, size range of aggregate of sand, replacing amount of superfine cement（SC） by ordinary Portland cement（OPC）, fly ash（FA） and ground granulated blast furnace（GGBFS） on compressive strength, void ratio and fluidity of SC RPC mortar were investigated. The test results show that SC can be used as the binder solely to prepare SC RPC. By using 30% GGBFS and 10% FA to replace the amount （by mass） of SC, the compressive strength of SC RPC mortar is the highest, the fluidity is the best. Blending with OPC caused void ratio of the material increase and compressive strength decrease. To fit the requirement of construction project, ordinary river sand with suitable size range can be used as aggregate. The suitable dosage of defoaming agent was recommended to be added into the mixture to increase the density. The computation module of the compressive strength influenced by factors of water to binder ratio and void ratio was established for mix proportion design of SC RPC mortar, and the factor of steel fiber content was also considered to calculate the compressive strength of SC RPC.