The invention discloses a lotus root, rhizoma dioscoreae and pueraria lobata chocolate and a preparation method. The lotus root, rhizoma dioscoreae and pueraria lobata chocolate comprises lotus root powder, rhizoma dioscoreae powder, pueraria lobata powder, wheatmeal, white granulated sugar and other raw materials at a certain percentage. The preparation method comprises the following steps: (1) mixing the raw materials at a certain ratio, adding water, agitating, inputting the uniformly agitated size into a rolling scratch board drier to dry into slices, and rotating and mashing at a slow speed to obtain lotus root, rhizoma dioscoreae and pueraria lobata crisp chips; (2) heating and melting cocoa butter; (3) adding the lotus root, rhizoma dioscoreae and pueraria lobata crisp chips to the melted cocoa butter, and mixing; (4) moulding the mixed lotus root, rhizoma dioscoreae and pueraria lobata chocolate size; (5) cooling and hardening; (6) releasing the hardened lotus root, rhizoma dioscoreae and pueraria lobata chocolate from a mould; and (7) metering and packing the lotus root, rhizoma dioscoreae and pueraria lobata chocolate. The lotus root, rhizoma dioscoreae and pueraria lobata chocolate is rational in a formula and convenient in operation, has the effects of fighting free radicals, resisting oxidation, resisting aging, resisting tumor, strengthening spleen and replenishing stomach, aiding digestion, nourishing kidney and boosting essence, replenishing lung and relieving cough, lowering blood sugar and preventing cardiovascular disease.