The invention discloses an alkali fusion tin extraction method for a tin containing material. The alkali fusion tin extraction method comprises the following steps that firstly, the tin containing material, alkali, a bonding agent and an additive are mixed evenly, and then the mixture is pressed into a block; secondly, the prepared block is subjected to microwave heating alkali fusion roasting, the roasting temperature ranges from 200 DEG C to 600 DEG C, and alkali fusion roasted slag is obtained; and thirdly, the alkali fusion roasted slag is subjected to water leaching, and a tin containingcompound in the roasted slag is extracted, wherein the additive is one or more of carbon, charcoal, graphite, activated carbon and activated coke. Through adding of the additive, any one of the coal,the charcoal, the graphite, the activated carbon, the activated coke and polyvinyl alcohol serves as the additive to be added into the tin containing material and the alkali for mixing alkali fusion,and the roasting temperature is obviously reduced on the basis that it is guaranteed that the Sn leaching rate is larger than or equal to 85%; and when the temperature is lower than 600 DEG C and evenlower than 300 DEG C, the tin element in the tin containing material can be effectively extracted.