The invention discloses an upgrading and silicon-reduction direct flotation method for silicate type hematite and limonite rough flotation concentrate. The method comprises the steps of conducting rough flotation, wherein water is added to the silicate type hematite and limonite rough flotation concentrate, so that pulp is obtained, the pulp is put into rough flotation equipment, a collecting agent, an inhibiting agent, an auxiliary collecting agent, a PH adjusting agent and H2SO4 with the concentration being 5% are sequentially added, and stirring for direct flotation is conducted, so that rough flotation concentrate foam and rough flotation tailings are obtained; conducting cleaner floatation, wherein the rough flotation concentrate foam is put into cleaner flotation equipment, an inhibiting agent is added, and stirring for direct flotation is conducted, so that cleaner flotation concentrate and cleaner floatation tailings are obtained; and conducting scavenging, wherein the cleaner floatation tailings are put into scavenging equipment, a collecting agent and/or an inhibiting agent, an auxiliary collecting agent, a PH adjusting agent and H2SO4 with the concentration being 5% are added, and stirring for scavenging is conducted, so that scavenging concentrate and scavenging tailings are obtained. The upgrading and silicon-reduction direct flotation method has the beneficial effects of being mature in process, stable in indicator, easy to operate, obvious in upgrading and silicon reduction effect and high in yield and recovery rate.